David Byrne

Born : 1974 Cat. M50 Ultrarunner since 2011

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details

Countries visited ?

Spain

Finland

France

United Kingdom

Germany

Italy

Norway

Romania

Switzerland

Sweden

57,9%

Rank quotient ?This runner's calculation uses 60 eligible race(s): Σ(rank − 1) = 7 942; Σ finishers = 13 714. 7 942 / 13 714 × 100 = 57.91%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed90

Km — ultra races6 267 km

> 100 km30

> 160 km7

> 24h1

Longest race169,0 km

Ultra Tour des 4 Massifs (UT4M) Challenge — 16/8/2017

Km per year (ultra races)

789

2022

512

2023

527

2024

330

2025

124

2026

Race types (share of distance)

Road1,0%

Trail57,6%

Stage41,3%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 31

🏅 Top 3 M1

Longest winning streak0

Current streak0

Records

50 km11h06'00 100 km17h18'26 50 mi10h08'58 100 mi26h31'43 24 h80,47 km

HISTORY

60 race(s)

Date		Race	Perf.	Rk
2026
24.04	124km	Grand Raid Ventoux by UTMB - 100M	27:52:44 h	369
2025
12.12	100mi	2nd Winter Downs 100	26:31:43 h	34
25.07	105mi	Lakeland 100 Mile	35:08:38 h	215
2024
08.11	85mi/3stages	XNRG Druid's Challenge	18:31:17 h	25
06.09	96km	SwissPeaks 100	28:44:55 h	210
26.07	105mi	Lakeland 100 Mile	35:17:55 h	208
27.04	125km	Grand Raid Du Ventoux 120km	26:25:16 h	80
2023
10.11	85mi/3stages	XNRG Druid's Challenge	18:35:14 h	36
28.07	105mi	Lakeland 100 Mile	32:39:56 h	134
24.06	100km	5th Jurassic Coast 100km Ultra	17:18:26 h	19
04.02	66mi/2stages	Pilgrim's Challenge	14:11:58 h	77
2022
13.11	29mi	XNRG Druid's Challenge Day 3	5:50:39 h	30
11.11	28mi	XNRG Druid's Challenge Day 1	6:13:57 h	55
11.11	85mi/3stages	XNRG Druid's Challenge	17:47:10 h	39
10.09	100km	Canfranc-Canfranc Ultra 100 kms	36:52:21 h	59
02.07	100km	5th Ultra-Trail Snowdonia UTS100	25:19:56 h	86
11.06	97.9km	4th Jurassic Coast 100 km Ultra	18:09:13 h	23
29.04	97mi/3stages	The Devil's Challenge	21:23:33 h	28
05.02	66mi/2stages	Pilgrim Challenge North Downs Way Multistage Ultra	15:11:33 h	100
2021
23.07	100mi	Lakeland 100 Mile	33:58:21 h	144
19.06	97.9km	3rd Jurassic Coast 100 km Ultra	18:31:50 h	29
2020
02.10	110km	North Coast 110 km	19:30:00 h	23
01.02	66mi/2stages	Pilgrim Challenge North Downs Way Multistage Ultra	14:24:24 h	79
11.01	45mi	12th GB Ultra Country to Capital	8:44:02 h	278
2019
08.11	84mi/3stages	11th Druid Challenge Ridgeway Multistage Ultra	18:29:09 h	57
06.07	111km	11ème Trail Verbier St Bernard - X-Alpine	31:15:20 h	192
24.05	166km	6 NUTS Karhunkierros 166km Trail Ultra	32:43:04 h	56
13.04	70km	1. Trail de Calabri	12:01:08 h	166
13.04	106km/2stages	1. Ultra Trail du Mont-Terrible	18:02:35 h	99
02.02	66mi/2stages	Pilgrim Challenge North Downs Way Multistage Ultra	15:58:43 h	117
2018
27.10	49km	Exmoor Ultra 50K	7:00:07 h	50
13.10	60mi/2stages	Pony Express New Forest Multistage Ultra	11:58:04 h	36
29.08	119km	9ème Sur les Traces des Ducs de Savoie	27:29:03 h	663
07.07	70mi/2stages	Round The Island Isle of Wight Multistage Ultra	15:31:10 h	20
16.06	101km	8 Zugspitz Ultratrail	22:01:43 h	265
19.05	82km	Transylvania One Hundred	20:00:45 h	32
31.03	40mi	2nd ‘Born To Run’ Ultra Marathon Festival 40mi Midnight	8:38:13 h	3 🥉
17.03	80km	11ème EcoTrail de Paris - Ile de France 80 km	11:31:54 h	1078
2017
10.11	84mi/3stages	9th Druid Challenge Ridgeway Multistage Ultra	29:13:58 h	120
16.08	169km/4stages	Ultra Tour des 4 Massifs (UT4M) Challenge	36:08:37 h	135
01.07	70mi/2stages	Round The Island Isle of Wight Multistage Ultra	14:46:41 h	27
10.06	24h	Endure 24 hour run	80.467 km	118
03.06	28.5mi	Calderdale Way Ultra	5:23:36 h	14
20.05	50km	Transylvania Half Hundred	11:06:00 h	146
16.04	32.6mi	Pendine Sands Ultra 32 Miles	6:28:00 h	10
2016
03.12	43mi	7th Ultra Brecon 40 - Winter	10:14:55 h	31
11.11	84mi/3stages	8th Druid Challenge Ridgeway Multistage Ultra	19:15:17 h	85
24.09	57mi/2stages	The Cotswold Way Challenge Multistage Ultra	13:59:10 h	22
05.08	120km	3rd Tierra Arctic Ultra 120 km	22:17:15 h	31
02.07	70mi/2stages	Round The Island Isle of Wight Multistage Ultra	23:44:50 h	63
21.05	80km	2nd EcoTrail of Oslo 80 km	12:10:35 h	298
30.04	60mi/2stages	Pony Express New Forest Multistage Ultra	17:36:15 h	86
2015
12.09	57mi/2stages	The Cotswold Way Challenge Multistage Ultra	14:31:21 h	26
24.07	50mi	Lakeland 50 Mile	12:35:14 h	193
2014
21.06	70mi/2stages	Round The Island Isle of Wight Multistage Ultra	17:40:31 h	39
10.05	50mi	4th Ultra Brecon 50 - Summer	10:08:58 h	44
2013
07.12	40mi	4th Ultra Brecon 40 - Winter	12:06:45 h	150
26.07	50mi	Lakeland 50 Mile	13:37:58 h	211
2011
26.08	98km	6ème Courmayeur-Champex-Chamonix	20:04:33 h	890
30.07	50mi	Lakeland 50 Mile	12:30:31 h	49

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	16/8/2017	Ultra Tour des 4 Massifs (UT4M) Challenge	169,00	×2
✓ 2	25/7/2025	Lakeland 100 Mile	168,98	×2
✓ 3	26/7/2024	Lakeland 100 Mile	168,98	×2
✓ 4	28/7/2023	Lakeland 100 Mile	168,98	×2
✓ 5	24/5/2019	6 NUTS Karhunkierros 166km Trail Ultra	166,00	×2
✓ 6	12/12/2025	2nd Winter Downs 100	160,93	×2
✓ 7	23/7/2021	Lakeland 100 Mile	160,93	×2
✓ 8	29/4/2022	The Devil's Challenge	156,11	×2
✓ 9	8/11/2024	XNRG Druid's Challenge	136,79	×2
✓ 10	10/11/2023	XNRG Druid's Challenge	136,79	×2
✓ 11	11/11/2022	XNRG Druid's Challenge	136,79	×2
✓ 12	8/11/2019	11th Druid Challenge Ridgeway Multistage Ultra	135,18	×2
✓ 13	10/11/2017	9th Druid Challenge Ridgeway Multistage Ultra	135,18	×2
✓ 14	11/11/2016	8th Druid Challenge Ridgeway Multistage Ultra	135,18	×2
✓ 15	27/4/2024	Grand Raid Du Ventoux 120km	125,00	×1
✓ 16	24/4/2026	Grand Raid Ventoux by UTMB - 100M	124,00	×1
✓ 17	5/8/2016	3rd Tierra Arctic Ultra 120 km	120,00	×1
✓ 18	29/8/2018	9ème Sur les Traces des Ducs de Savoie (TDS)	119,00	×1
✓ 19	7/7/2018	Round The Island Isle of Wight Multistage Ultra	112,65	×1
✓ 20	1/7/2017	Round The Island Isle of Wight Multistage Ultra	112,65	×1
✓ 21	2/7/2016	Round The Island Isle of Wight Multistage Ultra	112,65	×1
✓ 22	21/6/2014	Round The Island Isle of Wight Multistage Ultra	112,65	×1
✓ 23	6/7/2019	11ème Trail Verbier St Bernard - X-Alpine	111,00	×1
✓ 24	2/10/2020	North Coast 110 km	110,00	×1
✓ 25	4/2/2023	Pilgrim's Challenge	106,22	×1
✓ 26	5/2/2022	Pilgrim Challenge North Downs Way Multistage Ultra	106,22	×1
✓ 27	1/2/2020	Pilgrim Challenge North Downs Way Multistage Ultra	106,22	×1
✓ 28	2/2/2019	Pilgrim Challenge North Downs Way Multistage Ultra	106,22	×1
✓ 29	13/4/2019	1. Ultra Trail du Mont-Terrible	106,00	×1
✓ 30	16/6/2018	8 Zugspitz Ultratrail	101,00	×1
✓ 31	24/6/2023	5th Jurassic Coast 100km Ultra	100,00	×1
✓ 32	10/9/2022	Canfranc-Canfranc Ultra 100 kms	100,00	×1
✓ 33	2/7/2022	5th Ultra-Trail Snowdonia UTS100	100,00	×1
✓ 34	26/8/2011	6ème Courmayeur-Champex-Chamonix (CCC)	98,00	×1
✓ 35	11/6/2022	4th Jurassic Coast 100 km Ultra	97,90	×1
✓ 36	19/6/2021	3rd Jurassic Coast 100 km Ultra	97,90	×1
✓ 37	13/10/2018	Pony Express New Forest Multistage Ultra	96,56	×1
✓ 38	30/4/2016	Pony Express New Forest Multistage Ultra	96,56	×1
✓ 39	6/9/2024	SwissPeaks 100	96,00	×1
✓ 40	24/9/2016	The Cotswold Way Challenge Multistage Ultra	91,73	×1
✓ 41	12/9/2015	The Cotswold Way Challenge Multistage Ultra	91,73	×1
✓ 42	19/5/2018	Transylvania One Hundred	82,00	×1
✓ 43	24/7/2015	Lakeland 50 Mile	80,47	×1
✓ 44	10/5/2014	4th Ultra Brecon 50 - Summer	80,47	×1
✓ 45	26/7/2013	Lakeland 50 Mile	80,47	×1
✓ 46	30/7/2011	Lakeland 50 Mile	80,47	×1
✓ 47	10/6/2017	Endure 24 hour run	80,47	×1
✓ 48	17/3/2018	11ème EcoTrail de Paris - Ile de France 80 km	80,00	×1
✓ 49	21/5/2016	2nd EcoTrail of Oslo 80 km	80,00	×1
✓ 50	11/1/2020	12th GB Ultra Country to Capital	72,42	×1
✓ 51	3/12/2016	7th Ultra Brecon 40 - Winter	69,20	×1
✓ 52	31/3/2018	2nd ‘Born To Run’ Ultra Marathon Festival 40mi Midnight	64,37	—
✓ 53	7/12/2013	4th Ultra Brecon 40 - Winter	64,37	—
54	16/4/2017	Pendine Sands Ultra 32 Miles	52,46	—
55	20/5/2017	Transylvania Half Hundred	50,00	—
56	27/10/2018	Exmoor Ultra 50K	49,00	—
57	13/11/2022	XNRG Druid's Challenge Day 3	46,67	—
58	3/6/2017	Calderdale Way Ultra	45,87	—